Centaurium tenuiflorum subsp. tenuiflorum

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 59

(a) Subsp. tenuiflorum :

Plant with a weak basal leaf-rosette. Inflorescence of 2-90 flowers. Corolla-lobes deep pink, entire at the apex. Corolla-tube not constricted below the limb. 2« = 40. Almost throughout the range o f the species.